Thermo Fisher Scientific Eutech PC 700 - Manual (Page 8)

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3. CONDUCTIVITY ELECTRODE
The PC 700 includes an electrode with a nominal cell constant of k
= 1.0, built-in temperature sensor, and 1 meter cable. The Ultem
body housing has good chemical resistant properties. The
electrode design offers fast temperature response and reduces air
entrapment, ensuring accurate, repeatable, and stable readings.
The wetted materials of the probe include:
• Polyetherimide (Ultem) – protective probe guard
• Polybutylterphalate (Valox) – sensor housing
• Stainless Steel (SS 304) – 2 bands
The protective probe guard can be removed temporarily for
cleaning however it must be re-attached during measurement and
calibration. Erroneous results will occur while the probe guard
is removed
Always immerse the probe beyond upper steel band for best
results. Use the fill line on the outside of the probe guard for
reference.
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4. PH AND MV CALIBRATION
4.1 pH Calibration
For best results, periodic calibration with known accurate standards is
recommended. Calibrate with standards that bracket your intended
measuring range while including a neutral standard (pH 7.00 or 6.86).
For example, if you expect to measure samples from pH 6.2 to pH 9.5,
calibration with 4.01, 7.00, and 10.01 will work well.
The PC 700 meter can be calibrated with up to 5 buffers. The
non-volatile memory retains all calibration values upon meter shut
down.